RT Journal Article
T1 Nanoparticle size threshold for magnetic agglomeration and associated hyperthermia performance
A1 Serantes Abalo, David
A1 Baldomir Fernández, Daniel
K1 Magnetic nanoparticles
K1 Magnetic agglomeration
K1 Magnetic hyperthermia
AB The likelihood of magnetic nanoparticles to agglomerate is usually estimated through the ratio between magnetic dipole-dipole and thermal energies, thus neglecting the fact that, depending on the magnitude of the magnetic anisotropy constant (K), the particle moment may fluctuate internally and thus undermine the agglomeration process. Based on the comparison between the involved timescales, we study in this work how the threshold size for magnetic agglomeration (daggl) varies depending on the K value. Our results suggest that small variations in K-due to, e.g., shape contribution, might shift daggl by a few nm. A comparison with the usual superparamagnetism estimation is provided, as well as with the energy competition approach. In addition, based on the key role of the anisotropy in the hyperthermia performance, we also analyse the associated heating capability, as non-agglomerated particles would be of high interest for the application
PB MDPI
YR 2021
FD 2021
LK http://hdl.handle.net/10347/27273
UL http://hdl.handle.net/10347/27273
LA eng
NO Nanomaterials 2021, 11(11), 2786; https://doi.org/10.3390/nano11112786
NO This research was funded by the Spanish Agencia Estatal de Investigación (project PID2019-109514RJ-100)
DS Minerva
RD 24 abr 2026